The low budget DIY XL conversion

[Nixpus]

Ran the big fat XL motor for 25 minutes or so yesterday... it is an absolute beast! And actually it didn't seem that power hungry? My drivetime was far better than the stock E-Revo my brother-in-law was playing with (Dang that thing is dull with the titan motors).

Without active cooling (bad idea I know) it did reach 92°C/198F after plowing through ½ a meter of weed up and down a hill... with a 14:1 gearing (another bad idea but I didnt check my final gearing result before running it).

As far as I could tell after letting it cool a bit it was ok. However I will look for a 45mm heat sink and gear down to around 18:1 ;)

The balance of the thing is great. A little nose heavy... but thats good in my book: Better power handling in a straight line + Better up hill climbing. Further more I would rather adjust a nose down landing than a rear bumber first landing. Putting the truck into reverse mid air sounds like a transmission killer? :)

I did one backflip... just to check.

I wonder a bit about gearing and heat. It shouldn't run freely and it shouldnt be loaded too heavily as far as I know... but how do I calculate the optimum? Guess I'll have to dig a bit in the brushless forum for that ansver.

[_dV]

Just gear it down until the motor temp level out and the esc starts to get hotter. Optimum is rather hard to work out theoretically ..lotsa factors that are individual to each machine.